Door-lock.



E. lOFERL. y Doon Laux.

. grimoum FILED JU'LY e.- 1909.

Patented Augz, 1910.

l a gunna-SHEET 1.

E.' POPERL; Doon 1.00K. A'PPL/IGATIQN FILED JULY e. @909.

Patented'Aug. 9, 1910..

-a SHEETS-SHEET z.

E. POFERL. DOOR LOCK. APPLICATION FILED JULY 6. 1909.

l a SHEBTS-SHBET- 3j v @Yiwu/saw l l Patented Aug. 9, 1910.

EDWARD PoFERL, or sir. PAUL, MINNESOTA. y

DOOR-LUCK.

y' .To all whom fit may concern:

Be it known that I, EDWARDV POFERL, a citizen ot'` the United States, .residing at St. Paul,=in the county of Ramsey and State of Minnesota, have invented certain new and useful Improvements in Door-Locks; and l' do hereby declare the' following to be a full, clear, and v,exact description of the invention; l such as will enable others 'skilled in the art tn which it appertains to nakeand use the saine.

l My invention 'has for its object to prothe casereinoved and with the lock bolt. in

'vide a'n improved lock, especially adapted for use asl a door lock, and to this end1t vconsists of the noveldevices and combinav.

defined in the claims.

illustrate the invention7 like characters indi- .brokeu a ay, showingl the inxpr'i'ived lock .with the bolt thereof projecting into afloclivlock case near the inner edge thereof. This tions of devices hereinafter described and In the accompanying drawings whichv cate like'parts throughout the 'several views.

*Referring to the drawings: Figure l is a `view-1n side elevation with some I mrts 4ing posi'tior1;ll`ig. il is a horizontal ,section taken ou a line :r2 of Fig/lgltig. 3 is a i i y A *trally below thee-leg 5 of the locltbolt is side elevation of the lock with one side -of its retracted or inoperative position; Fig. 4 is 'a vertical section taken Oualme of? m of Fig'. 3; 'Fig'.' is a vertical section taken on a line m ot' Fig. 8, some partsbeing removed; (i is a plan view of the k'eyf; Fig". 7 .is a detail in side eleyation :showing the lock bolt removed. from the lock; and Figs.` 8, 9 and l0' are' detail views in. sidey elevation showing several of these-called tumblers of the lock.I

The lock oase 1 is of rectangular form and` is provided with a detachable side plete 2', shown as secured thereto by, screws. The lock bolt v,3 is mounted to slide horizontally through the front edge plate ot' the case and.k between guide liangest-,located within the lock bolt 8 is provided with a depending leg preferably formed integral therewith.. This leg 5 iis preferably flat and located centrally in respect; to the body of the bolt 3, and as shown, is approximately ono-third as thick as the said bou', this feature being best shown in Fig. 2. i l

(')nthe back plate of the casel 1 is a pairof rotary projecting guideA lugs Gand-7,- located respeetively above and belowthe loody-iii I Specification of Letters .Peter-1t.l i Application filed July 6, 1909. serial No. 505,970.

the bolt Thedepending'leg 5 of the holt Patented alle. e, ziele.

isforined vwith a horizontal elongated perforation 8, throughwhich the lower guide lug 'T projects. In its lower edge, theleg 5 is formed with a large approximately V shaped notch` 9, that affords a calnsurface to be engaged by the'blade of the keyl l0.

-The construction of this -key Willrbeniore fully considered later on. y Just forward of' l the upper portieri of the lego, the lock bolt y3 is formed with upper and lower lock shoulders l1 and lool:v notches 12,and just' rea1\:vard ot the upper portion of thesaid leg 5, said bolt is toi-ined by the upper and lower lock shouldersv 13 and upper and lower lool; notches ll. The lool; shoulders 1]. and 13, and notches l2 and lll are the full width of the loodj."l of the. bolt 3;

Both side plates of thefca'se l are foriiied with key holes of rspecial ifrnin; being as shown, provided with in vvfardly projecting lugs 1G, three in number. 'To adaptthelieY` tor insertion into the lock li'oul-eitlier side thereot'` as required for anontsidewlooiu the key blade 1T is formed with grooves'lbI that are adapted to clear the said lugs ll. i

Rlgidly secured with the lockl case, cen- ;nr obstruction plate 19, having a."central notch '2O adapting the ley blade to'be inserted in the. lock case through the key holes 15. Yhen this plate 19 is employed', the key blade lf is necessarily provided with a small slit 22, which adapts said blade to clear said plate 19 when the key is rotated within the lock. Immediately on each sidek of this slit 22, the lock bolt is provided with projecting cani lugs 23,'both of which are adapted to engage `with the divergingfcam surfaces of vthe notch 9 of the leg 5. On each side of the' cam lugs 23, the'key. bladert?, inY its outer edge, is provided with eau- 1 surfaces 24, 25 and Q6, and in its upper `and lower edges, said blade isprovided with clearance notches 27. The clearance notches?? vare adapted to clear obstructitm inthe plus o r studs 2S secured in the two side plates of the v Alock case projecting slightly inward, as best shown inFigs. 4 ando. The cam surfaces 24, 25, and 26 are adapted tor action upon A `tl1e l which will non7 `be considered.

" The so-calld lockftuniblers 2.9'7fare'vl pref-v erablystamped fronti thin sheet metal and lock tunlblers preferably"inv the forni ot ver- 3 tical movable slides,

construction of inadeperfectly flat, although they" inay'A of"L vcolurse,'loe otherwisey constructed. j They are ance 'passage guided for vertical .movements by the guide lugs 6 and 7 above 'noted and are provided lfor that purpose with vertically elongated slots 30, through which the said guide lugs are passed. Any desired number of these l tumblers 29 may be employed, but as illustrated in the drawings, there are six thereof, located three on each side of the depending `lock portion 5 of the lock bolt. Alsowith the key. provided with the cam surfaces 24, 25- and.26 .in step relation, all located at varying distances from the axis of the key stem,-the lower ends of these tumblers 29 are preferably arrangedv to stand coincident or in horizontal line when the said tumblers are in their normal lowermost positions. Each tumbler, on its lefthand side, is provided with upper and lower lock lugs 31, and a clearance passage 32, and on its right hand side, each tumbler is provided with upper and lower lock lugs 33, and a clear- 34. In all of the tumblers 29, the distance between lock lugs 31-31 and 33--33 is but very slightly greater than the vertical distance between the Iupper and.

lower surfaces of the lock shoulders 11-11 I and 13--13,bei`ug in fact, only sufficiently greater to permit sliding movements of' the bolt 3 when all of the said tumblers are p ositioned with the said coperating surfaces horizontally alined. j

When the lock bolt 1s in its projected position, as shown in Fig. 1, it is independently locked in that position by the upper lock lugs 33, "of all of the tumblers. The said bolt can be moved inward only when all of the said tumblers are given .the required however, the said tumblers are all properly moved so as to remove both their upper and lower lock lugs from the notches 14, and the key is then inserted and its blade rotated against the cam surface 9 of the bolt leg 5, the said bolt will be moved inward into its vretracted or inoperative' position, shown in Fig. 3. The cam surfaces 24, 25 and 26, of the key blade 17, as already indii cated, are so relatively located that they will impart the required differential vertical movements t0 the tumblers 29 required to release lock Abolt 3, as above just stated, and tlieywvill effect this release of the lock bolt just before the key blade 17 is engaged with the said rear cam surface 9. When the lock bolt is in its retracted or innermost position,

as shown in Fig. 3, and is locked in vsueh position by the upper lock lugs 31 Q .all of the tumblers 29 an and turned against the front cam surface 9 of the bolt leg 5, the cam surfaces 24, 25 and 26, actin on the lower ends vof the tumblers 29 w1ll impart to the latter dierential movements required to throw ally of the upper lock lugs 31 out of the coperating upper l'ock notches 12 without engaging the lower lock lug 31 of any tumbler with the "lower lock notch 12, this action, as is evident, being similar to that above described, which takes place in moving the lock bolt from its projecting into' its retracted position. "The above described action7 of course, requires the proper relationl of the cam surfaces 24, 25 and 26 in respect to the length of the lock lugs 31 and 33 of the several tumblers. To illustrate: if we assumed the lock lugs of the tumbler shown in vFigs. 1G, 9 and 3,'to be respectively one-sixteenth of an inch, two-sixteenths of aninchr and three-sixteenths of an inch long in a vertical direction, then the cam surfaces 26 should be arranged to impart,one-sixteenth of an inch vertical movement to the Voutermost tumbler, (one of which is shown inv Fig. 10), the cam surfaces 25 should be arranged to impart two-'sixteenths of an inch vertical movement to the next outer tumblers (one of which is shown in'Fig. 9), andthe cam surfaces 24 should be.V arranged to impart three-sixteenths of an inch vertical-.movement to the inner tumblers (one of which is shown in 8)'. It will` thus be seen that the tumblers, when moved to predetermined intermediate positions', release the lock bolt,

whenthe key is inserted.

but when movedin either direction" from v such intermediate. releasing positions, lock thebolt 1n one orithefjother of itsextreme ositlons. Inasmueh as different movements are requlredto set 'the difeienttumblersin' l' theirreleasi'ng osition andlas either' too muchl or too -l1tt e movement of any one of the tumblers will hold the bolt locked, it is practically impossible, either byV taking wax impressions or otherwise to determine ,the form of key required to release or operate the lock. As isaevident', the number of the so-called lockftum-blers may be either increased or decreased, at will, and in some instances, tumblers :having lock lugs only above or only below a lock bolt, instead of both above and below, .as-,Shown in vthe drawings, may beA employed.I

In the drawings','theloclt bolts onopposite' l sides of the b olt leg 5 are in loi-symmetrical arrangement, soy thatgthe lock may be' operated by a l'tey'insent'ed from'either vside of the lock. This adapts the lock for use on outside doors. Vif-here the lock 'is to be used in a place Where the key is always inserted in the same side of the lock, 'the tumblers o n opposite sides of the leg' 5, 'where the said y lated by the diii'erent normal positions of the keyl engaging portions of the tumblers;

leg is employed, or otherwise stated, all of the tumblers employed in the lock may be arranged for dlferent amounts of movement, and this, as is evident, will double the number of tumblers and, hence, very greatlyv the number of possible combina- .due entirely to the varia-tion in positions of the tumbler lifting surfaces 24, -and 26, but, however, the tumbler lifting surfaces of the key might be on the same line and the4 dili'erent movements of the tumblers reguor, to complicate the matter, the different movements of the tumblers might be due .in art to the diiferent positions of the tum ling engaging surfaces on the key and notches,

in partito the different positionsor relations of the key engaging surfaces ofthe saidv tumblers.

What I claim is: v

1. In a lock, 'the combination with a lock bolt havin a depending leg in which a key is engagea le to move saiv e i a multi licity of key-actuated differentially movab e sliding tumblers havbolt, said bolt having upper and lower front and rear lock 4 ing upper'and lower front and rear lock lugs coperating withthe notches of said bo t to lock the sameV but serving to release 'said bolt.when the proper predetermined differential movements are imparted to said vtumblers by the key, substantially as described.

2. In a lock, the combination with a sliding lock bolt having an intermediatel located depending leg narrower than' the ody of said bolt and wlth which the lock key is engageable to (move said bolt, said bolt havingupper and lower front and rear -lock notches, of 'a multiplicity of dierentially movable sliding tumblers in bisymmetrical arran ement on op osite sides' ofsaid leg, where: y' said tum ers may beo'perated by a key inserted in either side of the-lock, said tumblers 'having upper and lower front and rear lock -lu notches .of said bolt tolec serving to release said bolt when and 4only predeterminedl differential movements ,are

sta-ntially as described." v v In testimon whereof I'aix my signatur in' presence o two witnesses. l l EDWARD-romani.. 1 VVitnesses: i i I ALICE V. SwANsoN,

Hangar D.

' ooperatin with the lock said bolt, but

. 5.5 parted to said tumblers by the key, sub.- 

